The coldfire since core V4e is fully compatible with the 68040. The first generation (5102) was already fully compatible with the 68EC040. It is an enhanced version of the originals 68k (410 MIPS @ 260MHz for actual coldfire and 110 Mips @ 75 MHz for 68060).
The coldfire embedded network, pci, usb, ... controllers. It is a great integrated processor but not enough powerful to face the PowerPC. It is a good solution to make an Amiga classic compatible computer with dedicated chipset in a FPGA. But the developpement costs would be too expensive for interested people.
